| /* |
| * Copyright 2016-present Open Networking Laboratory |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.onosproject.yangutils.parser.impl.listeners; |
| |
| /* |
| * Reference: RFC6020 and YANG ANTLR Grammar |
| * |
| * ABNF grammar as per RFC6020 |
| * type-body-stmts = numerical-restrictions / |
| * decimal64-specification / |
| * string-restrictions / |
| * enum-specification / |
| * leafref-specification / |
| * identityref-specification / |
| * instance-identifier-specification / |
| * bits-specification / |
| * union-specification |
| * |
| * bits-specification = 1*(bit-stmt stmtsep) |
| * |
| * ANTLR grammar rule |
| * |
| * typeBodyStatements : numericalRestrictions | stringRestrictions | enumSpecification |
| * | leafrefSpecification | identityrefSpecification | instanceIdentifierSpecification |
| * | bitsSpecification | unionSpecification; |
| * |
| * bitsSpecification : bitStatement+; |
| */ |
| |
| import org.onosproject.yangutils.datamodel.YangBits; |
| import org.onosproject.yangutils.datamodel.YangLeaf; |
| import org.onosproject.yangutils.datamodel.YangLeafList; |
| import org.onosproject.yangutils.datamodel.YangType; |
| import org.onosproject.yangutils.parser.Parsable; |
| import org.onosproject.yangutils.parser.antlrgencode.GeneratedYangParser; |
| import org.onosproject.yangutils.parser.exceptions.ParserException; |
| import org.onosproject.yangutils.parser.impl.TreeWalkListener; |
| |
| import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorLocation.ENTRY; |
| import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorLocation.EXIT; |
| import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorMessageConstruction.constructListenerErrorMessage; |
| import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorType.INVALID_HOLDER; |
| import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorType.MISSING_CURRENT_HOLDER; |
| import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorType.MISSING_HOLDER; |
| import static org.onosproject.yangutils.parser.impl.parserutils.ListenerValidation.checkStackIsNotEmpty; |
| import static org.onosproject.yangutils.utils.YangConstructType.BITS_DATA; |
| import static org.onosproject.yangutils.utils.YangConstructType.TYPE_DATA; |
| |
| /** |
| * Represents listener based call back function corresponding to the "bits" rule |
| * defined in ANTLR grammar file for corresponding ABNF rule in RFC 6020. |
| */ |
| public final class BitsListener { |
| |
| /** |
| * Creates a new bits listener. |
| */ |
| private BitsListener() { |
| } |
| |
| /** |
| * It is called when parser enters grammar rule (bits), it perform |
| * validations and updates the data model tree. |
| * |
| * @param listener listener's object |
| * @param ctx context object of the grammar rule |
| */ |
| public static void processBitsEntry(TreeWalkListener listener, |
| GeneratedYangParser.BitsSpecificationContext ctx) { |
| |
| // Check for stack to be non empty. |
| checkStackIsNotEmpty(listener, MISSING_HOLDER, BITS_DATA, "", ENTRY); |
| |
| if (listener.getParsedDataStack().peek() instanceof YangType) { |
| YangBits bitsNode = new YangBits(); |
| Parsable typeData = listener.getParsedDataStack().pop(); |
| |
| // Check for stack to be non empty. |
| checkStackIsNotEmpty(listener, MISSING_HOLDER, BITS_DATA, "", ENTRY); |
| |
| Parsable tmpData = listener.getParsedDataStack().peek(); |
| |
| switch (tmpData.getYangConstructType()) { |
| case LEAF_DATA: |
| bitsNode.setBitsName(((YangLeaf) tmpData).getName()); |
| break; |
| case LEAF_LIST_DATA: |
| bitsNode.setBitsName(((YangLeafList) tmpData).getName()); |
| break; |
| // TODO typedef, union, deviate. |
| default: |
| throw new ParserException(constructListenerErrorMessage(INVALID_HOLDER, TYPE_DATA, |
| ((YangType<?>) typeData).getDataTypeName(), ENTRY)); |
| } |
| listener.getParsedDataStack().push(typeData); |
| listener.getParsedDataStack().push(bitsNode); |
| } else { |
| throw new ParserException(constructListenerErrorMessage(INVALID_HOLDER, BITS_DATA, "", ENTRY)); |
| } |
| } |
| |
| /** |
| * It is called when parser exits from grammar rule (bits), it perform |
| * validations and update the data model tree. |
| * |
| * @param listener Listener's object |
| * @param ctx context object of the grammar rule |
| */ |
| public static void processBitsExit(TreeWalkListener listener, |
| GeneratedYangParser.BitsSpecificationContext ctx) { |
| |
| // Check for stack to be non empty. |
| checkStackIsNotEmpty(listener, MISSING_HOLDER, BITS_DATA, "", EXIT); |
| |
| Parsable tmpBitsNode = listener.getParsedDataStack().peek(); |
| if (tmpBitsNode instanceof YangBits) { |
| YangBits bitsNode = (YangBits) tmpBitsNode; |
| listener.getParsedDataStack().pop(); |
| |
| // Check for stack to be non empty. |
| checkStackIsNotEmpty(listener, MISSING_HOLDER, BITS_DATA, "", EXIT); |
| |
| Parsable tmpNode = listener.getParsedDataStack().peek(); |
| switch (tmpNode.getYangConstructType()) { |
| case TYPE_DATA: { |
| YangType<YangBits> typeNode = (YangType<YangBits>) tmpNode; |
| typeNode.setDataTypeExtendedInfo(bitsNode); |
| break; |
| } |
| default: |
| throw new ParserException( |
| constructListenerErrorMessage(INVALID_HOLDER, BITS_DATA, "", EXIT)); |
| } |
| } else { |
| throw new ParserException( |
| constructListenerErrorMessage(MISSING_CURRENT_HOLDER, BITS_DATA, "", EXIT)); |
| } |
| } |
| } |